baber/WOPTO huggingface dataset:
Patent KR-20000048179-A (KR)
Inventor: MATZDAHIROMI
IPC: G06T5/50
Filed: 1999-12-16
Abstract: PURPOSE: An image synthesizing apparatus and an image processing apparatus are provided to perform synthesizing base and synthesized images as well as fading processing at a time. CONSTITUTION: An image synthesizing apparatus includes a first synthesizer(6), a single image generator(22,24), a selector(7), and a second synthesizer(8). The first synthesizer(6) mixes the base image data and the synthesized image data which is to be synthesized with the base image data. The single image generator(22,24) generates one piece of single image data or a plurality pieces of image data. The selector(7) selects one piece of the pieces generated by the single image generator(22,24). The second synthesizer(8) mixes the output of the first synthesizer and the output of the selector.
Patent KR-20000017861-A (KR)
Inventor: CHOI KYU IL
IPC: A01G9/12
Filed: 1999-12-23
Abstract: PURPOSE: A supporting device for hot pepper seedling is installed by assembling a supporting pole of which the height is adjustable and protects the hot pepper from cold frost by covering with vinyl resin and fixing it CONSTITUTION: Supporting poles(1, 2) are installed in front and back of both sides of furrow, a middle bar(3) is fixed by a fixture between the supporter(1) and (2). A prop(5) is joined to the middle bar(3) between the hot pepper seedlings by regular intervals. A cap(7) having connecting ring(6) is joined to an upper part of the supporting pole. A rope(8) and vinyl resin fixing clip(9) are joined to the connecting ring and the middle bar by regular intervals respectively.
Patent KR-20010064098-A (KR)
Inventor: LEE SEONG HUN
IPC: G11C8/00
Filed: 1999-12-24
Abstract: PURPOSE: A digital delay locked loop having an analog delay member is provided to reduce the layout size, to accelerate locking and to reduce signal jittering noise. CONSTITUTION: The digital delay locked loop includes an input terminal(200), a digital delay, a phase detector(250), a charge pump(260), a voltage controlled delay member(220), a driver(230), and a delay monitor(240). The input terminal inputs a clock signal(CLK) and a clock signal bar(CLKB) to generates an internal clock at either of rising or falling edges. The digital delay receives the output of the input node and adjusts time delay amount. The phase detector receives the internal clock and comparison clock to generate an up signal and down signal. The charge pump receives the up and down signals to generate increased or decreased voltage control signal. The voltage controlled delay member receives the output of the digital delay member and adjusts the time according to the voltage level of the voltage control signal(cvon). The driver generates the internal clock with response to the output of the voltage controlled delay member. The delay monitor receives the output of the driver and generates a comparison clock(comp_clk) having delay same to that of the delayed time.
Patent KR-20010061662-A (KR)
Inventor: CHOI IL SEOP
IPC: C21B9/00
Filed: 1999-12-28
Abstract: PURPOSE: A method for controlling the temperature of a hot stove for blast furnace by applying a mutual influence between control input and process variables to a control model and suitably controlling the amount of mixture gas and air is provided, which can reduce the input amount of fuel as well as controlling the temperature of a dome of a checker chamber and exhaust gas at the same time. CONSTITUTION: In a method for controlling the temperature of a hot stove equipped with a combustion chamber and checker chamber for supplying heat blast of a specified temperature to a blast furnace, the method comprises the steps of: modeling a desired trajectory to the dome temperature of a checker chamber and exhaust gas; setting the aim dome temperature of the checker chamber and exhaust gas; calculating control input using an evaluation function using the measured value of the dome temperature of the checker chamber and exhaust gas as variables; controlling a fuel and air flow controller; and feed back controlling.
Patent KR-20010061881-A (KR)
Inventor: SHIN DONG JO
IPC: F16C13/00
Filed: 1999-12-29
Abstract: PURPOSE: A manufacturing method of a roller for an electronic camera is provided to shorten manufacturing time and to improve yield rate by simplifying a manufacturing process of a roller. CONSTITUTION: A pellet of thermoplastic resin having low molecular weight, rubber powder having a diameter of 1-9 micrometers and peroxide powder are mixed without an additive. The mixture is molten in a hopper of an extruder. The molten material is molded in a mold of a T-die having a support member. The material is aged in a dry oven, and elastic compound is obtained therefrom. Herein, crosslinking reaction for using the peroxide as a crosslinking agent is generated between the thermosetting resin molecules and the rubber molecules. Specific elasticity and mechanical properties are applied to the elastic compound. The aging process is performed in the dry oven to prevent influence to electric properties of the peroxide. The aging temperature is 50-150deg.C and the aging time is 5-40min. to adjust charged voltage. Finally, the elastic compound is grinded corresponding to set size and impurities are eliminated. UV(Ultra Violet) rays are radiated over the elastic compound to adjust a friction coefficient. Therefore, a roller for an electronic camera is obtained.
Patent KR-20000017922-A (KR)
Inventor: SEO SUNG HYUN
Filed: 1999-12-29
Abstract: PURPOSE: A gift presenting method between members in wed site is provided to give and take a point, equivalent to money available in the web site related to contents providing such as shopping mall, chatting system, etc., as a gift between members. CONSTITUTION: The gift presenting method between members in wed site comprises: a step 1 that determines whether a gift sending application is selected; a step 2 that confirms a credit information data for gift sending applicant; a step 3 that displays a gift goods list by items; a step 4 that confirms a message sent with a gift and inputs the message to the applicant; a step 5 that proceeds an identification of the applicant with his password; a step 6 that processes a small settlement from on-line credit bank for money equivalent to the point of goods selected by the applicant; a step 7 that increases a using point of the applicant and a received point of a gift taker; and a step 8 that display a message for the completion of the gift transmission to the applicant and informs the taker of the gift arrival with a slip of paper.
Patent KR-20010059144-A (KR)
Inventor: KIM SEONG GEUN
IPC: F02B39/00
Filed: 1999-12-30
Abstract: PURPOSE: A method for detecting failure in an engine overpressure sensor is provided to precisely detect normal operation of the overpressure sensor by comparing a value detected by an atmosphere sensor and a value detected by the overpressure sensor. CONSTITUTION: A control instrument outputs a control signal to a vehicle state detect instrument. Then, the control instrument receives an overpressure, engine RPM(Revolutions Per Minute), and an atmospheric pressure. In case of the overpressure value is between a minimum value and a maximum value, the control instrument decides normal operation of an atmospheric sensor. In case of the engine RPM under a first established value, a value calculated by subtracting the atmospheric pressure from the overpressure is compared with a second established value. In case of the subtracted value is over or the same with the second established value, a failure in the overpressure sensor is decided. A failure displaying signal is transferred to a failure display instrument to report the failure to a user.
Patent KR-20010059184-A (KR)
Inventor: SHIN SEONG HO
IPC: F16H61/00
Filed: 1999-12-30
Abstract: PURPOSE: An oil pump driving device equalizes the discharging flow amount of an oil pump with required flow amount to minimize power loss due to the unneeded driving of the oil pump to improve fuel economy. CONSTITUTION: A driving pulley(44) is placed on an input shaft(4). A driven pulley(48) is placed on an oil pump shaft(46) to be driven by a belt(V). The thrust of the driving pulley(44) is controlled by an elastic member(50). The thrust of the driven pulley(44) is controlled by the hydraulic pressure. The driving pulley(44) comprises a fixed pulley(52) integrally or fixedly placed on the input shaft(4) and a moving pulley(54) placed movably to the axial direction on the input shaft(4). The elastic member(50) is placed between the moving pulley(54) and a transmission housing(16). The moving pulley(58) moves toward or from the fixed pulley(56) to reduce or increase speed to control the oil discharging amount.
Patent KR-20010059854-A (KR)
Inventor: KIM DONG JIN
IPC: H01L21/336
Filed: 1999-12-30
Abstract: PURPOSE: A semiconductor device and a method for manufacturing the semiconductor device are provided to maintain a sidewall topology of a gate electrode stable during manufacturing a screen oxide layer for forming an LDD(lightly doped drain) region accurately. CONSTITUTION: The semiconductor device includes a gate dielectric layer(14), a gate electrode, a screen oxide layer(22), an LDD region(24) and a spacer oxide layer(26). The gate dielectric layer is formed on the semiconductor substrate. The gate electrode includes a conductive metallic oxide layer on the gate dielectric layer. The screen oxide layer is formed on the front surface of the substrate which includes the gate electrode. The LDD region is formed in the near from the edge of the gate electrode. The spacer oxide layer is formed on the sidewall of the gate electrode. The gate electrode further includes a doped amorphous silicon layer(16) on or under the conductive metallic layer.
Patent KR-20000017988-A (KR)
Inventor: YANG JAE YEOL
IPC: B64F5/00
Filed: 1999-12-30
Abstract: PURPOSE: A measuring device of a linear actuator torque for a rudder controller of an airplane is provided to exactly measure a tension torque and a compression torque of a linear actuator. CONSTITUTION: A measuring device of a linear actuator torque for a rudder controller of an airplane has: a base frame(10) making an upper frame(20) and an indicator(300) installed on the upper area and able to be moved by a wheel; the upper frame having components for measuring the tension and the compression torque of a linear actuator installed; a torque measuring instrument(100) fixed on a worm axis(201) of the linear actuator through a bolt(102) to measure a torque in the initial revolution of the worm axis; an indicator(300) indicating the torque value as a numerical value by accepting the value which is generated from the torque measuring instrument through a cable(101); a weight(60) having a ring(61) to hang wires; a tray(81) laying the weight on; and a weight lifting device(900) where components for lifting the tray are installed.
Patent KR-20000068038-A (KR)
Title: 가변 속도 전송 방법 및 가변 속도 전송 장치
IPC: H04J11/00
Filed: 1997-09-12
Abstract: 데이터 신호를 확산 부호 계열을 사용하여 확산 변조하여 송신하는 가변 속도 전송 장치이고, 데이터 신호의 전송 레이트가 소정의 전송 레이트(128kbps)이상인 경우는 배직교 신호를 사용하여 상기 데이터 신호를 2값 계열의 상태에서 확산 변조하여 전송하는 수단(4, 5, 6)을 구비한 가변 속도 전송 장치.
Patent KR-20000068849-A (KR)
IPC: F25B41/06
Filed: 1998-08-28
Abstract: A refrigeration circuit arrangement for a refrigeration system including, between the outlet of the condenser (4) and the inlet of the evaporator (8) of said circuit, a valve (20) of refrigerant fluid flow control, having a refrigerant fluid passage (22), whose cross section varies during the operation of the hermetic compressor (1) in a manner inversely proportional to the variation of the condensation temperature, in order to allow the condensed refrigerant fluid supplied to the evaporator (8) to have a temperature substantially correspondent to a nominal condensation temperature of the system.
Patent KR-20000068961-A (KR)
Title: 테이프카세트 및 테이프기록장치
IPC: G11B27/11
Filed: 1998-09-11
Abstract: 자기테이프상에 기록데이터가 기입되는 복수의 파티션을 가지는 테이프카세트에 있어서, 각 파티션에 부착된 번호(P 1 , P 2 , P 3 …)를, 자기테이프의 시단(BOT)측보다 종단(EOT)측으로 향해서 상승하여야할 순으로서, 파티션을 추가할 때에는 최종의 파티션을 분할하여, 분할부보다 후편을 신규파티션으로 하고, 거기까지의 파티션번호의 최대번호(P n )에서 하나를 증가한 번호(P n+1 )의 파티션으로 하여, 파티션의 추가나 삭제가 자유로히 행하도록 한다.
Patent KR-20000069058-A (KR)
IPC: C07D277/40
Filed: 1997-12-08
Abstract: 본 발명은, 제 1 단계에서 2-클로로-5-메틸티아졸을 자유 라디칼 형성제, 및 자유 라디칼 할로겐화제에 안정한 희석제의 존재하에서 자유 라디칼 염소화제를 사용하여 40 내지 70 중량% 를 전환시켜 할로겐화시키고, 이어서 제 2 단계에서, 암모니아 또는 암모니아 수용액을 반응 결과 혼합물에 가하고, 2-클로로-5-아미노메틸티아졸을 통상의 방법으로 분리함을 특징으로 하는 2-클로로-5-아미노메틸티아졸의 제조 방법에 관한 것이다.
Patent KR-20000057313-A (KR)
Title: Liquid compositions containing n-alkyl ammonium acetonitrile salts
Inventor: CHOY CLEMENT K
IPC: C11D7/54
Filed: 1997-11-18
Abstract: PURPOSE: Provided are N-alkyl ammonium acetonitrile compounds in a liquid matrix, and particularly liquid compositions containing a source of active oxygen useful in applications such as bleaching and cleaning. CONSTITUTION: Provided are liquid cleaning or bleaching compositions containing compounds having the structure of formula (I) wherein A is a saturated ring formed by five atoms in addition to the N1 atom, the five saturated ring atoms being four carbon atoms and a heteroatom, the substituent R1 bound to the N1 atom of the formula (I) structure including either (a) a C1-24 alkyl or alkoxylated alkyl where the alkoxy is C2-4, (b) a C4-24 cycloalkyl, (c) a C7-24 alkaryl, (d) a repeating or nonrepeating alkoxy or alkoxylated alcohol, where the alkoxy unit is C2-4, or (e) -CR2R3CN where R2 and R3 are each H, a C1-24 alkyl, cycloalkyl, or alkaryl, or a repeating or nonrepeating alkoxyl or alkoxylated alcohol where the alkoxy unit is C2-4, the R2 and R3 substituents are each H, a C1-24 alkyl, cycloalkyl, or alkaryl, or a repeating or nonrepeating alkoxyl or alkoxylated alcohol where the alkoxy unit is C2-4, and wherein Y is a generally anionic counterion and Z is in the range of 0 to 10. Additional, adjunct materials commonly found in liquid cleaning and bleaching compositions can be added.
Patent KR-20000069880-A (KR)
Title: 높은 동적 범위의 디지털 플럭스게이트 자력계
IPC: G01R33/04
Filed: 1998-11-06
Abstract: 신호 처리 알고리즘에서 사용하도록 자기 신호를 디지털화하기 위해 디지털 논리와 고해상도 디지털-대-아날로그 변환기(40)을 사용하는 개선된 디지털 플럭스게이트 자력계(20)이 제공된다.  이 자력계는 발진기 신호를 출력하는 발진기(1) 및 상기 발진기에 결합된 구동 코일(13a), 피드백 코일(13b), 및 센스 코일(13c)를 갖는 자기 플럭스게이트 센서(13)을 포함한다.  아날로그 승산기(14)는 상기 센스 코일과 상기 발진기에 결합되어 아날로그 저역 통과 필터(21)에 신호를 출력한다.  비교기(22)는 아날로그 승산기에 결합되며, 레지스터(23)은 상기 비교기의 출력에 따라 논리 1 또는 논리 0을 출력한다.  디지털 필터(27)은 레지스터의 출력을 수신하며 디지털 플럭스게이트 자력계의 디지털 출력을 생성한다.  고해상도 디지털-대-아날로그 변환기(40)은 센서의 피드백 루프 내에 있는 레지스터 및 자기 플럭스 게이트 센서의 피드백 코일 사이에 결합된다.  디지털-대-아날로그 변환기는 센서의 동적 범위를 충분히 표현하는데 필요한 대단히 높은 (전형적으로 22 비트보다 큰) 해상도의 디지털화된 출력을 생성한다.
Patent KR-20000070169-A (KR)
IPC: F23C15/00
Filed: 1998-01-15
Abstract: 음향학적 공명기(2), 상기 공명기 내에 펄스 연소를 일으키는 장치, 및 교류 발전기(16)를 구비하는 에너지 변환 장치. 교류 발전기는(16)는 공명기(2)에 커플링 되어 있어서 음향학적으로 구동된 동적 진동을 전력으로 변환한다.
Patent KR-20010005528-A (KR)
Title: 그라프트된 에틸렌 공중합체
IPC: C08F255/02
Filed: 1998-03-19
Abstract: 본 발명은 불포화산 또는 무수물 0.1중량% 이상으로 그라프트된 알파-올레핀, 및 에틸렌을 포함하는 그라프트된 에틸렌 공중합체로서, 
     그라프트되기 전의 공중합체가 1) 비닐리덴대 비닐 말단 쇄 불포화도 비가 3 이하이고, 2) CDBI가 60% 이상이고, 알룸옥산 활성화제 및/또는 비배위 음이온과 조합된 하나 이상의 모노- 또는 비스-사이클로펜타디에닐 전이 금속 촉매를 사용하여 제조되고, 
     그라프트된 공중합체가 하기 수학식 1에 따라 계산했을 때 쇄당 불포화산 또는 무수물 분자수가 2 이상임을 특징으로 하는 그라프트된 에틸렌 공중합체에 관한 것이다: 
     수학식 1 
     [Mn*UAA(중량%)]/[UAA(Mw)] 
     상기 식에서, 
     Mn은 GPC로 측정한 수평균분자량이고, UAA(중량%)는 FTIR 분광계로 측정한 불포화산 또는 무수물의 백분율이고, UAA(Mw)는 불포화산 또는 무수물의 분자량이다.
Patent KR-20010012509-A (KR)
Title: 기재에 오염 제거 특성을 부여하기 위한 친수성 분절 및플루오로케미칼 올리고머를 지닌 폴리우레탄을 포함하는플루오로케미칼 조성물
IPC: C08G18/38
Filed: 1998-05-14
Abstract: 본 발명은 
     (A) 하기 화학식 I의 플루오로케미칼 올리고머, 
     (B) 18 내지 280개의 옥시알킬렌 부분을 가지는 폴리(옥시알킬렌)기를 포함하고 이소시아네이트와 반응할 수 있는 이작용성 화합물을 
     (C) 디이소시아네이트 또는 트리이소시아네이트와 반응시켜 얻을 수 있는 폴리우레탄을 포함하는 플루오로케미칼 조성물을 제조하는 방법을 제공하는 것이다. 
     화학식 I 
     M f   m M n -Q 1 -T 1   
     상기 화학식에서, 
     M f   m M n 는 플루오르화 단량체로부터 유도된 m 단위체 및 플루오르 무함유 단량체로부터 유도된 n 단위체를 포함하는 플루오로케미칼 올리고머를 나타내며, 이때, 플루오르화 단량체 및 플루오르 무함유 단량체는 동일하거나 또는 상이할 수 있고, 
     m은 2∼40이며, 
     n은 0∼20이고, 
     T 1 은 -OH 또는 -NH 2 이며, 
     Q 1 및 T 1 은 함께 T 1 으로 작용화된 사슬 전달제로부터 수소 원자를 제거하여 얻은 유기 잔기를 나타낸다. 전술한 방법에 의해 제조한 플루오로케미칼 조성물로 처리한 기재는 특히 유성 오염 및 수계 오염, 예를 들면 와인, 차, 커피 등에 대해 오염 제거 성능이 우수하다.
Patent KR-20000057706-A (KR)
Title: Misoperation prevention method and apparatus, and storage medium for storing software product for preventing misoperation
Inventor: SAKAGUCHI AKIRA
IPC: G06F3/048
Filed: 2000-01-03
Abstract: PURPOSE: A wrong operation prevention method and system is provided to invalidate an operator's operation for example, a double click over a windows display screen in the case that one function, executed by pushing a corresponding button, must be finished without an interruption though other button is pushed by the operator. CONSTITUTION: A wrong operation prevention method comprises steps of generating a transparent window(110) behind a window application(120) where an invalid operation can occur, outputting the generated transparent window(110) over the window application while processing the invalid operation if an operation occurs on the window application(120), moving the transparent window(110) to the original position again if the invalid operation is finished, a set time has passed, or a set condition is satisfied. The operation on the application window(120), caused by the operator, can be prevented while the transparent window(110) is displayed over the application window(120).
Patent KR-20000024169-A (KR)
Inventor: AN YOUNG GUN
IPC: F16N11/00
Filed: 2000-01-26
Abstract: PURPOSE: A device for automatically supplying grease is provided to keep the components in optimum state in any traveling condition. CONSTITUTION: A time for supplying grease(1) is determined by calculating as two points per 1km of traveling distance when selecting an express way traveling switch(13), calculating as three points per 1km of traveling distance when selecting a general street or city street traveling switch(14), calculating as four points per 1km of traveling distance when selecting a non-paved street traveling switch(15), and operating a grease pump(17) at a control panel(6) according to the approach to certain points to push the grease to a pipe(11). Herein, the grease is supplied at proper time without regard to the condition of the street where a vehicle is traveling and then the optimum traveling condition is maintained.
Patent KR-20010076601-A (KR)
Title: Food rubbish drying system
Inventor: LEE HWA JO
IPC: B09B3/00
Filed: 2000-01-27
Abstract: PURPOSE: Provided is a dryer for treating food waste, which eliminates moisture by transferring the food waste by a natural dropping method and keeps the moisture to be 20-30% by supplying hot blast in order to ease aftertreatment. CONSTITUTION: The dryer(10) for treating the food waste comprises: a hexahedral body(13) comprising an inner body(11) and an outer body(12), which has an injecting hole(14) with a lid, a discharge hole(15), and supporting legs(16); guides(22, 23) on the both side of which partitions(20) are protruded and in the center of which open parts(21) are formed, which is inclined downward to drop the food waste in zigzag naturally; auxiliary guides(24, 25) mounted on the end of the guides(22, 23); a blowing fan(28) for supplying the hot blast generated from a heat exchange(27) to dry the food waste, which is mounted on the upper part of the discharge hole(15); an oscillator(26) for shaking the body(13) to help the natural dropping of the food waste.
Patent KR-20000024390-A (KR)
Inventor: SEONG KIE JEONG
IPC: E03D5/04
Filed: 2000-02-11
Abstract: PURPOSE: A toilet is provided to maintain a bathroom clean all the time by preventing the generation of bad smell due to remained excrements in a toilet by not operating a washing lever after stool. CONSTITUTION: A toilet(10) is composed of: a pressure sensor(20) established at the rim of the upper part, a controller(30) for generating a signal for operating an operator(40) established on the upper end of the rear part of the toilet(10) to supply washing water by receiving the signal generated from the pressure sensor(20) and the power supply unit(50) for supplying the power to operate the controller(30), the operator(40) and the pressure sensor(20). The operator(40) equips a solenoid valve for supplying and intercepting washing water supplied to the toilet(10) for a specific time by an operation signal transmitted from the controller(30). Then the solenoid valve is constituted to open/close a water supply pipe(60) for a specific time. The toilet minimizes an establishment area of a restroom as maximizing a free space of the restroom because it does not need a storage tank of washing water and a washing lever.
Patent KR-20000030233-A (KR)
Inventor: PARK MOON SOO
IPC: B41D1/08
Filed: 2000-02-14
Abstract: PURPOSE: A mat of an album is provided to conveniently assemble the mats in an album without any additional adhering agents, reinforcement materials or rim parts by forming the mats having an indented part and a foldable strip with synthetic resin. CONSTITUTION: A mat of an album includes an adhering groove(29) having a complementary size to a general photograph and a depth larger than a thickness of the photograph and coated with an adhering agent for adhering the photograph so that the coating agent of the coating paper coated on the photograph is prevented from leaking out on the mat and damaging the mat and the gap between the mats is prevented thereby the thickness of the album is not changed, an indented part(24) formed at one edge portion for binding, and a strip(28) formed of synthetic resin by injection molding in the complementary shape to the indented part to be foldable in the opposite direction to the indented part, wherein a plurality of coupling protrusions(22) are formed integrally in the indented part by injection molding and a plurality of coupling holes(26) are formed integrally in the strip by injection molding so that the coupling protrusions are inserted into the coupling holes.
Patent KR-20000024596-A (KR)
Inventor: KIM GYOUNG MOG
IPC: C02F11/16
Filed: 2000-02-22
Abstract: PURPOSE: A fermentation method of sludge from waste water plant or garbage is provided, which is characterized in that wood-chip is used. CONSTITUTION: A method is fermentation of sludge from waste water plant or garbage to reduce and to recycle cost using wood chip. Sawdust is more difficult to recycle and hard to reduce the amount than the wood chip. Microorganisms of the wood chip can be reused by dryness and the garbage is reused for provender after fermentation. The wood chip is larger than 0.3 cubic centimeters and controls water content. The wood chip is collected by net and dried after use, and can be reused without adding fermentation microorganism.
Patent KR-20010091073-A (KR)
Title: Construction of air bearing of head slider for stabilized floating
Inventor: CHOI DONG HOON
IPC: G11B21/21
Filed: 2000-03-13
Abstract: PURPOSE: An air bearing structure of a head slider with stable lift is provided to minimize the abrasion of a head slider and a disc while preventing the vibration of the head slider and the damage on a head. CONSTITUTION: A head slider(20) lifts a head to a predetermined height to read out information in a state of having non-contact with a disc. An inlet is formed in a layer-structure to block impurities in an air introducing direction and produce pressure. A main rail(22) is extended in a symmetrical structure from the inlet(21) to a rear direction, and includes the first groove(22a), the second grooves(22b) and an edge(22c). An auxiliary rail(23) is extended from a center of the main rail(22) toward a rear direction to divide the first groove(22a) into two parts, and maintains a predetermined void(23a) form the main rail(22) on both sides of a rear end. The main rail(22) has a difference on a rear end part to end up on a point which is approximately 11/12 of an overall length of the head slider(20).